136681403 has 2 divisors, whose sum is σ = 136681404. Its totient is φ = 136681402.

The previous prime is 136681399. The next prime is 136681409. The reversal of 136681403 is 304186631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136681403 - 2² = 136681399 is a prime.

It is a super-3 number, since 3×136681403³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 136681403.

It is not a weakly prime, because it can be changed into another prime (136681409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68340701 + 68340702.

It is an arithmetic number, because the mean of its divisors is an integer number (68340702).

Almost surely, 2^136681403 is an apocalyptic number.

136681403 is a deficient number, since it is larger than the sum of its proper divisors (1).

136681403 is an equidigital number, since it uses as much as digits as its factorization.

136681403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 136681403 is about 11691.0821996939. The cubic root of 136681403 is about 515.1137499704.

The spelling of 136681403 in words is "one hundred thirty-six million, six hundred eighty-one thousand, four hundred three".